o-pleural suture, separating the mesopleura from the
sternopleura.

Sterno-rhabdite: a sternal rhabdite.

Sternorhynchi: that series of Homoptera in which the beak or rostrum
apparently arises from the sternum between the anterior coxae; e.g.
plant lice, etc.

Sternum -a: the breast: the middle portion of the under surface of
thorax, between the coxal cavities.

Stethidium: the trunk: the entire thorax with all its appendages.

Stigma: a spiracle or breathing pore: a dense, often discolored portion
of the costal margin of a wing, usually at the end of the radius; see
anastomosis: in Diptera, a colored wing spot near the tip of the
auxiliary vein: in Lepidoptera, the specialized patch of black scales on
the primaries of Hesperidae.

Stigmata: the spiracles: also applied to the two spots, orbicular and
reniform, in the cell of the primaries of certain moths.

Stigmatal line: in caterpillars, = spiracular; q.v.

Stigmatiferous: applied to processes or structures bearing spiracles or
stigmata.

Stimuli: the small acute spines on some larva, especially wood-borers

Sting: the modified ovipositor in aculeate Hymenoptera.

Stipes: the foot-stalk of the maxilla; articulated partly to the head,
partly to the cardo, and bearing the movable parts: modified into a
piercing structure in some Diptera and into a lever for flexing the
proboscis in others.

Stipitate: supported on a stalk or pedicle.

Stipites: the outer pair of forceps in male genitalia of aculeate
Hymenoptera see sagittae.

S. T. line: sub-terminal line; crosses the primaries of many moths
just before the outer margin.

S. T. space: the area between the t.p. line and s. t. line in moths.

Stirps: a stock or stem: a division of classification similar to
super-family: not used at present.

Stoma -ata: a breathing pore or pores:= stigma; q.v.

Stomach: that portion of the alimentary canal, immediately following
the gizzard and preceding the ileum, into which most of the digestive
juices are poured = chylific ventricle.

Stomatodaeum: that invagination of the ectoderm that forms the
mouth, pharynx, oesophagus, crop and gizzard.

Stomatogastric: that system of nerves and ganglia, lying along the
dorsal and lateral surfaces of gullet and crop.

Stomatotheca: that part of the pupa covering the mouth structures.

Stramineous -eus: straw yellow [pale clay yellow].

Strangulate: constricted, as if by bands or cords.

Stratified: arranged or made u